While many believe that himalayan salt lamps can cleanse your indoor air, scientific research suggests otherwise. These lamps emit very few negative ions, far too few to significantly reduce dust, allergens, or pollutants in a room. What they can do well is create a warm, relaxing ambience—perfect for winding down after a long day. If air quality is a concern, proper ventilation or an air purifier with HEPA filters will be far more effective. Still, salt lamps offer a beautiful and soothing decor touch that many find comforting.